What is the difference between 589.01 and 0.210

It is 588.8 as all you have to do is subtract 0.210  from 589.01 and add up the ''.''

The quantities of them are different. 0.210 has no whole, just a part and 589.01 is a whole but also has a part. 

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.